The common life-span of N95 masks

Taking into account hygiene, damage and respiratory resistance, the life of all filters on NIOSH approved respirators will be limited. All filters should be replaced as long as they are damaged, soiled or significantly increase breathing resistance.

Generally, N series filters should be used and reused in consideration of hygiene, damage and increased respiratory resistance. However, for dirty workplaces, which may result in a higher filter load (ie 200 mg), it should be evaluated in a specific workplace to prove that the use time of N series filters can only be extended for more than eight hours (continuous Or intermittent). :

(a) Long-term use will not reduce the efficiency of the filter below the efficiency level specified in 42 CFR 84

(b) the total mass load of the filter is less than 200 mg. These determinations will need to be repeated whenever conditions change or modifications are made to the process that may change the type of particles produced in the user’s facility.